Shooting as a worldwide sports competition began in the first Olympic Games in 1896. Since 1897, the world shooting championships have been held every year. In 1907, the international federation of national shooting associations was established (renamed international shooting union in 1921). After 1931, the world shooting championship was changed to one every two years, and in 1954 it was changed to one every four years. The first world shooting game due to use of guns have different specifications, the project is not the same, nor a complete unified rules of the game in the world, as well as in quite a long period of time, therefore, game changing of the project, each session of events is the same as the few rules. It was not until the 1940s that events and rules were gradually stabilized. The early world games used military guns, and the firing methods were similar to those of the military. Then it added a hunting rifle game to simulate the hunt for a wild animal. Since the production of various sports guns for use in the shooting campaign, new events have emerged. 1897 session of the first world shooting championships shall only use one kind of guns for five games of the project, to 42nd world shooting championships 1978, the use of guns species increased to 12, the project has 52, attend the striker number as many as 1200 people. There are many difficulties in organizing international competitions with the increase in the number of events and the number of participants. The European shooting championships have been held in several countries, including rifles, pistols and running pigs and flying saucers, to resolve the difficulties of organizing large games.
We now want the milk to maneuver somewhat. To do this large changing milk science experiment requires some washing up liquid or 'dish soap'. Get a cotton wool ball and dip it down into the soap - don't put to much soap about it, you don't want the swab to become dripping in soap. Carefully dab the cotton swab into one of several food coloring's in the soap and contain the swab there. Bang! Watch large explode outwards in concentric circles - very pretty.